Knot Theory: Second Edition - Paperbackby Vassily Olegovich Manturov (Author) Over the last fifteen years, the face of knot theory has changed due to various new theories and invariants coming from physics, topology, combinatorics and alge bra. It suffices to mention the great progress in knot homology theory (Khovanov homology and Ozsvath Szabo Heegaard Floer homology), the A polynomial which give rise to strong invariants of knots and 3 manifolds, in particular, many new unknot